import java.util.Scanner;

public class NGuessNumber {
    public static int[] numbers = new int[4];

    public static int[] generateAnswer() {
        int index = 0;


        while (true) {
            int random = (int) (Math.random() * 9);
            int j = 0;
            for (; j < numbers.length; j++) {
                if (random == numbers[j]) {
                    break;
                }
            }
            if (j == numbers.length) {
                numbers[index++] = random;
            }
            if (index == 4) {
                break;
            }

        }
        return numbers;
    }

    public static int[] guesslist = new int[4];

    public static int[] getPlayerInput() {

        try {
            Scanner scan = new Scanner(System.in);

            for (int i = 0; i < 4; i++) {
                System.out.println("请输入0-9之间的第" + (i + 1) + "个数字：");

                int pl = scan.nextInt();
                if (pl >= 10 || pl < 0) {
                    System.out.print("输入错误，");
                    i = i - 1;
                } else {
                    guesslist[i] = pl;
                }
            }
        } catch (Exception e) {
            System.out.println("输入错误");
        }
        return guesslist;
    }

    public static int a_num = 0;
    public static int b_num = 0;

    public static String compareGuessAnswer() {
        a_num = 0;
        b_num = 0;

        for (int i = 0; i < numbers.length; i++) {
            for (int j = 0; j < numbers.length; j++) {
                if (i != j) {
                    if (numbers[i] == guesslist[j]) {
                        b_num++;
                    }
                } else {
                    if (numbers[i] == guesslist[j]) {
                        a_num++;
                    }
                }
            }
        }
        System.out.println(a_num + "A" + b_num + "B");
        System.out.println("A表示存在且位置正确的数字个数，B表示存在且位置不正确的数字个数！");
        System.out.println("如：1A2B,表示你猜测的四个数字有3个是对的，有一个位置对，两个位置不对。\n");

        return a_num + "A" + b_num + "B\n" + "A表示存在且位置正确的数字个数，B表示存在且位置不正确的数字个数！\n" + "如：1A2B,表示你猜测的四个数字有3个是对的，有一个位置对，两个位置不对。";
    }

    public static boolean isWin() {
        boolean flag = false;

        if (a_num == 4) {
            flag = true;
        } else {
            flag = false;
        }
        return flag;

    }

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        while (true) {

            generateAnswer();
            while (true) {
                getPlayerInput();
                compareGuessAnswer();
                if (isWin()) {
                    System.out.println("玩家胜利");
                    break;
                } else {
                    System.out.println("猜错了，再试一次");
                }
            }
            System.out.println("在玩一次(y/n)");
            String choice = scanner.next();
            if (!choice.equalsIgnoreCase("y")) {
                break;
            }
        }
    }
}
